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Introduction To ProfiBus DP

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Acromag, Inc. Tel:248-624-1541 Fax:248-624-9234 Email:sales@acromag.com http://www.acromag.com

This byte identifies the end of a ProfiBus telegram and has a fixed value

of 16H.

The following functions are implemented in DP slaves and class 1

masters (see SAP descriptions above). There are only 8 mandatory slave

functions, plus the optional Set_Slave_Add function (the slave address can

usually be set via external switches). All commands noted below are

optional for class 2 master devices.

Functions DP Slave Class 1 Master

Data_Exchange

√ √

Rd_Inp

√

Rd_Outp

√

Slave_Diag

√ √

Set_Prm

√ √

Chk_Cfg

√ √

Get_Cfg

√

Global_Control

√ √

Set_Slave_Address

√ (Optional)

Get_Master_Diag

√

Start_Seq

√ (Optional)

Download

√ (Optional)

Upload

√ (Optional)

End_Seq

√ (Optional)

Act_Para_Brct

√ (Optional)

Act_Para

√ (Optional)

The corresponding function acknowledgements will contain a status

parameter that may be tested to verify the success of a function request.

Possible status values are shown in the following table:

Status Value Description

OK Acknowledgement positive.

IV Invalid parameters in request.

NO Service in this state not possible.

DS Local FDL/PHY entity is not in logical token ring or

disconnected from line.

NA Negative Acknowledge – No reaction from remote station.

RS Service or remote-address at remote-LSAP or remote-

LSAT not activated:

Remote station is no DP-Station,

Remote station is not ready for these functions,

Remote station is associated with another requestor,

Optional service not available.

RR Resources of the remote-FDL entity not sufficient or not

available.

UE Remote-DDLM/FDL interface error.

NR No response data.

TO Function timeout expired.

FE Format error in request frame.

RE Format error in response frame.

LE Data block length too large (Upload/Download)

NI Function not implemented.

EA Area too large (Upload/Download)

End Delimiter (ED)

DP COMMAND

FUNCTIONS

Function Status

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 37 38

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